fcp-video-poster.html

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This WPT test may be referenced by the following Test IDs:
- /paint-timing/fcp-only/fcp-video-poster.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<head>

<title>Performance Paint Timing Test: FCP due to loaded video poster</title>

</head>

<body>

<script src="../resources/utils.js"></script>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<video id="video" width="50" height="50"></video>

<script>

  setup({"hide_test_state": true});

  promise_test(async t => {

    assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported.");

    await new Promise(r => window.addEventListener('load', r));

    await assertNoFirstContentfulPaint(t);

    const video = document.getElementById('video');

    const src = '../resources/circles.png';

    const image = new Image();

    image.src = src;

    video.setAttribute('poster', src);

    await new Promise(resolve => {

        image.onload = async () => resolve();

})

    await assertFirstContentfulPaint(t);

  }, 'Video should become contentful when poster is loaded');

</script>

</body>

</html>